Ovarian cyst. Endoscope view of a woman's right ovary (yellow, upper left) that is swollen by an ovarian cyst. The left ovary (yellow/white) is normal and is seen at upper right. The top of the uterus is at lower centre. Ligaments (lower left and lower right) attach the ovaries to the uterus. The Fallopian tubes, below the ligaments, are seen at far right and left, running round from the uterus to above the ovaries. Ovarian cysts result from the swelling of an egg-producing follicle in the ovary. Such cysts are not usually malignant, but large ones may develop complications and require surgical removal. A follicle (red spot at upper left) is seen on the swollen ovary.